Some letters cannot be entered

[max87i]

Some letters cannot be entered

Installed are draftail: 1.3.0 with draft-js: 0.11.1
If you change draft-js version to 0.10.5, issue is gone.

Reproducible demo

https://codesandbox.io/s/draftail-editor-6gsh4?fontsize=14

[zerolab]

The issue is highlighted in #213

[BSStefan]

Tried to fix it in my forked repo: #213 (comment).